78630513 has 32 divisors (see below), whose sum is σ = 120019200. Its totient is φ = 45432576.

The previous prime is 78630511. The next prime is 78630527. The reversal of 78630513 is 31503687.

It is a happy number.

It is not a de Polignac number, because 78630513 - 2¹ = 78630511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78630511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40908 + ... + 42786.

It is an arithmetic number, because the mean of its divisors is an integer number (3750600).

Almost surely, 2^78630513 is an apocalyptic number.

It is an amenable number.

78630513 is a deficient number, since it is larger than the sum of its proper divisors (41388687).

78630513 is a wasteful number, since it uses less digits than its factorization.

78630513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 78630513 is about 8867.3847892149. The cubic root of 78630513 is about 428.4140478166.

The spelling of 78630513 in words is "seventy-eight million, six hundred thirty thousand, five hundred thirteen".